PHTHALOCYANINES AND THEIR USE IN INK-JET PRINTING

摘要

A compound of Formula (1 ) and salts thereof: MPc - (R¹-NR²-R³)_n Formula (1 ) wherein: M is Cu or Ni; Pc represents a | phthalocyanine nucleus of formula; R¹ is optionally substituted C_1-4alkylene; R² is H or optionally substituted C_1-4alkyl; R³ is optionally substituted alkyl, optionally substituted aryl, optionally substituted acyl or optionally substituted heterocyclyl; or R² and R³ are joined together to form with the nitrogen a heterocyclic ring which may contain other heteroatoms; n is 1 to 8: and provided that at least one of R¹, R² and R³ carries at least one acidic water solubilising substituent selected from the group consisting Of -SO₃H, -CO₂H and -PO₃H₂. Also compositions, inks, printing processes, printed materials and ink-jet cartridges.